<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品列表</el-breadcrumb-item>
           
        </el-breadcrumb>

        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary"  @click="showAddCateDialog">添加</el-button>
                </el-col>
            </el-row>
            
        </el-card>

        <!--表格-->
        <tree-table class="treeTable" :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" :show-index="true" index-text="#" border :show-row-hover="false">
            <!--是否有效-->
            <template v-slot:isok="scope">
                <i class="el-icon-success" style="color:lightgreen" v-if="scope.row.cat_deleted === false"></i>
                <i class="el-icon-error" style="color:red"  v-else></i>
            </template>

            <!--操作-->
            <template v-slot:order="scope">
                <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                <el-tag type="warning" size="mini" v-else>三级</el-tag>
            </template>

            <!--分页区域-->
            <template v-slot:opt="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>

            </template>
        </tree-table>

        <!--分页-->
        <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>

       <!--添加分类的对话框-->
       <el-dialog
       title="添加分类"
       :visible.sync="addCateDialogVisible" width="50%" @close="addCateDialogClosed">
       <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px" class="demo-ruleForm">
           <el-form-item label="分类名称:" prop="cat_name">
             <el-input v-model="addCateForm.cat_name"></el-input>
           </el-form-item>

           <el-form-item label="父级分类:">
            <el-cascader
            v-model="value"
            :options="parentCateList"
            @change="parentCateChange" clearable change-on-select expand-trigger="hover" :props="cascaderProps">
            </el-cascader>
           </el-form-item>
       </el-form>
       <span slot="footer" class="dialog-footer">
           <el-button @click="addCateDialogVisible = false">取 消</el-button>
           <el-button type="primary" @click="addCate">确 定</el-button>
       </span>
       </el-dialog>
    </div>
</template>


<script>
    export default {
        data(){
            return {
                //查询数据
                queryInfo:{
                    type:3,
                    pagenum:1,
                    pagesize:5
                },

                //商品分类的数据
                catelist:[],
                value:[],
                total:0,
                //为tbale指定列的定义
                columns:[{
                    label:'分类名称',
                    prop:'cat_name'
                },
                {
                    label:"分类名称",
                    type:'template',
                    //表示当前这一列使用的模板
                    template:'isok'
                },
                {
                    label:"排序",
                    type:'template',
                    //表示当前这一列使用的模板
                    template:'order'
                },
                {
                    label:"操作",
                    type:'template',
                    //表示当前这一列使用的模板
                    template:'opt'
                }
                ],
                addCateDialogVisible:false,
                addCateForm:{
                    cat_name:'',
                    cat_pid:0,
                    cat_level:0
                },
                addCateFormRules:{
                    cate_name:[
                        {required:true,message:"请输入分类名称",trigger:'blur'}
                    ]
                },
                //父级分类的列表
                parentCateList:[],
                cascaderProps:{
                    value:'cat_id',
                    label:'cat_name',
                    children:"children"
                }
            
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            //获取商品分类数据
            async getCateList() {
                const {data:res} = await this.$http.get('categories',{
                    params:this.queryInfo
                })
                if(res.meta.status !== 200){
                    return this.$message.error('获取商品分类失败')
                }
                console.log(res.data)
                this.catelist = res.data.result
                this.total = res.data.total
            },
            //监听pagesize改变
            handleSizeChange(newSize) {
                this.queryInfo.pagesize = newSize
                this.getCateList()
            },
            //监听pagenum改变
            handleCurrentChange(newPage){
                this.queryInfo.pagenum = newPage
                this.getCateList()
            },
            showAddCateDialog(){
                //先获取父级分类的数据列表
                this.getParentCateList()
                this.addCateDialogVisible= true

            },
            async getParentCateList() {
                const {data:res} = await this.$http.get('categories',{
                    params:{type:2}
            })

            if(res.meta.status !== 200){
                return this.$message.error('获取父级分类数据失败')
            }
            console.log(res.data)
            this.parentCateList = res.data
            },
            parentCateChange(){
                console.log(this.value)
                //value数组中的数组长度大于0说明选中父级分类
                if(this.value.length >0 ){
                    this.addCateForm.cat_pid = this.value[this.value.length-1]
                    this.addCateForm.cat_level = this.value.length
                    return 
                } else {
                    this.addCateForm.cat_pid = 0 
                    this.addCateForm.cat_level = 0
                }
            },
            addCate(){
                this.$refs.addCateFormRef.validate(async valid => {
                    if (!valid) return 
                    const {data:res} = await this.$http.post('categories',this.addCateForm)
                    if(res.meta.status !== 201){
                        return this.$message,error('添加分类失败！')
                    }
                    this.$message.success('添加分类成功')
                    this.getCateList()
                    this.addCateDialogVisible = false
                })
            },
            addCateDialogClosed(){
                this.$refs.addCateFormRef.resetFields()
                this.value = []
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            }
        }
    }
</script>

<style lang="less" scoped>
    .treeTable{
        margin-top: 15px;
    }

    .el-cascader {
        width:100%
    }
    
</style>